¶ Phenomenon
The printer makes stalling sound when homing the Y axes (moves toward the front end).
¶ Possible Reason
The X-axis maybe not perpendicular to the Y-axes due to some impact during transportation. The limit bar (in position 1) blocks the movement, and the printer fails to trigger the photoelectric sensor (in position 2) on the Y axis.
¶ Solution
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Power off the machine.
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If you have removed the limit bars on the Y axes, please install them back in the original places.
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Use a screwdriver (H2.5) to loosen the two screws on the coupling of the Y motor.
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Move the print heads to the center of the X axis, then push the X-axis to the front of the machine and make it against the upper frame.
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Make sure you can see the screws on the coupling of the Y motor. You may need to keep the X axis not moving and rotate the coupling to a proper position to see the screw.
Pay attention to the detail below. Make sure that the end of the optical shaft is not visible from the middle of the coupling, which means the coupling and the optical shaft are fully coupled.
- Push the print heads to make sure they are against the upper frame. Then use a screwdriver (H2.5) to tighten the screws on the coupling.
